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Investigation of Catalytic Chain Transfer Copolymerization of Methacrylates
Author(s) -
Nikitin Anatoly N.,
Grady Michael C.,
Kalfas Georgios A.,
Hutchinson Robin A.
Publication year - 2008
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.200800017
Subject(s) - methacrylate , chain transfer , copolymer , methyl methacrylate , catalysis , catalytic chain transfer , chain termination , polymer chemistry , kinetics , polymerization , chain (unit) , chemistry , transfer agent , materials science , chemical engineering , radical polymerization , organic chemistry , polymer , physics , quantum mechanics , astronomy , engineering
Batch experiments were carried out to investigate the kinetics of catalytic chain transfer copolymerization of methyl methacrylate and n ‐butyl methacrylate. The Predici® model developed to represent the system describes the numerous experimental data measured at high concentrations of Co( II ) catalyst, taking into account the chain‐length dependencies of termination, propagation and catalytic chain transfer. The constants for catalytic chain transfer are determined as 2.3 × 10 4 for both methyl methacrylate and n ‐butyl methacrylate from fitting the experimental data. Two inhibition mechanisms are shown to describe the decrease of the polymerization rate in the presence of catalyst equally well, with an unknown impurity dissolved in initiator introduced to explain experimental profiles measured at high initiator concentrations.